It should also be noted that Captain Fitch, the off duty pilot on board, was studying about the Japan Airlines 123 incident, which happened a few years ago. It involved the similar situation in which a B747 lost all its hydraulic controls due to a bulkhead breach, resulting in complete loss of controls on all control surfaces as well as the entire tailfin itself. Captain Fitch was studying about ways to maintain control of the aircraft when the hydraulic controls are completely lost, and without him and his knowledge the incident would have been incomparably disastrous than it was.